1.
Select Help > Sample Data Library and open Density Compare.jmp.
2.
From the Graph menu, select Overlay Plot.
3.
Assign gamma1, gamma3, and gamma5 as the Y variables.
4.
Assign Xgamma as the X variable.
5.
6.
Turn of the Show Points option by selecting Y Options > Show Points from the red triangle menu.
Function Plot

Help created on 9/19/2017